Move PageTransition into content namespace. While I'm touching all these files, I've also updated...

chrome/browser/autocomplete/keyword_provider.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/autocomplete/keyword_provider.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/string16.h"
@@ skipping 417 matching lines @@
   // more highly than a "what you typed" match from one of the other providers,
   // we just don't bother to do this, and leave inline autocompletion off.
   result.inline_autocomplete_offset = string16::npos;
 
   // Create destination URL and popup entry content by substituting user input
   // into keyword templates.
   FillInURLAndContents(profile_, remaining_input, element, &result);
 
   if (supports_replacement)
     result.template_url = element;
-  result.transition = PageTransition::KEYWORD;
+  result.transition = content::PAGE_TRANSITION_KEYWORD;
 
   return result;
 }
 
 void KeywordProvider::Observe(int type,
                               const NotificationSource& source,
                               const NotificationDetails& details) {
   TemplateURLService* model =
       profile_ ? TemplateURLServiceFactory::GetForProfile(profile_) : model_;
   const AutocompleteInput& input = extension_suggest_last_input_;
@@ skipping 82 matching lines @@
 }
 
 void KeywordProvider::MaybeEndExtensionKeywordMode() {
   if (!current_keyword_extension_id_.empty()) {
     ExtensionOmniboxEventRouter::OnInputCancelled(
         profile_, current_keyword_extension_id_);
 
     current_keyword_extension_id_.clear();
   }
 }